Oil strainer



Oct. 9, 1928. 1,687,292

A. E. GRANT OIL STRAINER Filed June 10, 1927 INVENTOR Albert E Gram B\' "'I Patented Oct. 9, 1928.

UNITED STATES A LBERTE. GRANT, OF NEW YORK, N. Y.

OIL STRAINER.

Application filed June 10,

My invention relates to strainers for oil used in oil burning systems, etc.

The object of my invention is to provide a strainer having a' large capacity considering the size of the casing, and also to provide a casing that can be separated to remove the mesh or filtering elements without disconnecting the pipes leading to and from the casing, and withoutspilling any oil, the construction being such that the oil may be shut off from the lower part of the casing containing the strainers, and the strainers freely removed for cleaning without dilliculty.

Referring to the drawings forming a part of this specification:

Figure 1 is an elevational view, shown partly in section, of a strainer embodying my invention.

Figure 2 is a plan view of thestrainer.

Reference character A indicates the top' portion of the casing and B, the bowl portion, each of which is provided with a flange A and B respectively. A packing ring C, serves to form atight joint between the flanges, and the flanges are secured together in separablerelation by screws or bolts l)-D, etc.

The top portion of the casing is provided with an inlet E and an outlet E A'bore or chamber F, is formed in the top A, in open communication with the outlet E and a passage G leads from the bowl to the chamber F, the lower end of said passage opening into the bowl near one side thereof as shown. The top end of the chamber F, is closed by a capplug H which is provided with a valve face H which fits a valve seat H formed in the wall of the chamber to provide a metal to metal joint at this point. The plug H is provided with a central threaded bore H and with a valve seat H at its lower end, and a valve stem I, is threaded to fit the thread in the bore H The valve-stem is provided with a square formed end 1 for engagement with a wrench to screw the stem I in operating the valve I formed integral with the stem, to its seat J, formed in the bottom of the chamber F, and controlling the passage G. The stem is also provided with a conical face I which fits the seat H, to prevent leakage by the'stem when the valve I is open. A similar valve-stem, valve, and seats, etc., is located in the housingportion K, to that just described, and its passage from the 1927. Serial No. 197,835.

valve-chamber is indicated by L, and leads within the upper end. of a gauze strainer M, which is cylindrical inv form and open at both ends.

The under side of the top portion is prov vided with a circular depending flange portion N, formed integral, and co] responding flanges N are formed integral with the bottom of the bowl. I

The length of the cylindrical strainers MM respectively, is such that they abut and are clamped tightly against the side surfaces of the flange portions N and N when the bowl B is secured to the top portions of the casing by the screws D.

The inner strainer is of coarse mesh relative to the outer strainer, so that their straining capacity is about equal.

The strainers are made of metal gauze from a sheet, the sheet being formed into cylindrical shape and the side seam is strongly soldered as illustrated at O, and each end is dipped in solder to provide a re-inforcement and a smooth surface for contact with the flanges, as illustrated at O and to provide-tight joints at the abutment points.

Oil is very hard to hold as it seeps thru the joints unless they are formed properly, and by using metal to metal valve seats I find I can prevent such leakage.

In operation, the valves being open, the oil flows thru the inlet to the inlet chamber and thru passage L into the space I and-thence thru the strainers to the space P and out thru the passages G and E tothe pipes connected therewith.

To remove the strainers to clean etc, the

valves I are closed, after which the bowl is. disconnected from the top, when the strainers may be freely removed without spilling any oil, since the depending flange portion Q, extends into the top of the bowl far enough to prevent overflow of the oil in the bowl when same is lowered relative to its top portion, as will be readily understood.

Having thus described my invention. I claim as new:

1. A strainer comprising an upper valve casing portion and a lower bowl portion, said upper portion having a depending part which extends into the upper end of the bowl to reduce the fluid capacity of the bowl; said upper portion having a valve controlled inlet passage and a valve controlled outlet passage,

and a strainer in said bowlin the line of flow of a fluid passing therethru, and means for connecting the bowl to the upper portion in separable relation therewith. t

2. A strainer comprising an upper valve casing portion and a lower bowl portion connected thereto in separable relation therewith, said upper portion having an inlet passage leading to the bowl and an outlet passage leading therefrom, a strainer in said bowl in the line of flow of a fluid passing from the inlet to the outlet passage, a cap-plug having a central threaded bore with a valve-seat formed at its lower end and a valve-stem having a valve for controlling one of'said passages and also provided with a valve face to abut the valve-seat formed on the cap-plug, said upper portion having a depending part which extends into the upper end of the bowl to reduce the fluid capacity thereof.

3. A strainer comprisingan upper valve casing portion and a lower bowl portion connected thereto in separable relation therewith, said upper portion having an inlet passage leading to the bowl and an outlet passage leading therefrom, a strainer in said'bowl in the line of flow of a fluid passing from the inlet to the outlet passage, a cap-plug having a central threaded bore wtih a valve-seat formed at its lower end and a valve-stem having a valve for controlling one of said passages and also provided with a valve fa'ce to abut the valve-seat formed on the cap-plug and a'duplicate construction carried by said upper part for controlling the other of said passages, said upper portion having a depending part which extends into the upper endof the bowl to reduce the fluid capacity thereof.

4. A strainer comprising an upper valve casing portion and a lower bowl portion, said upper portion having a valve controlled inlet passage and a valve controlled outlet passage, and astrainer in said bowl in the line of flow of a fluid passing therethru, and

' means for connecting the bowl to the upper portion in separable relation therewith, said strainer comprising a cylindrical gauze mesh,

the ends of which are reinforced by. soft metal such as solder.

signature. 5. A strainer comprisingan upper valve duce the fluid capacity of the bowl, said upper.

portion having a-valve controlled inlet pas- ,sage and a valve controlled outlet passage,

and a strainer in said bowl in the line of flow of a fluid passing therethru, and means for connecting the bowl to the upper portion in separable relation therewith, said strainer comprising two cylinders of gauze mesh of relatively different diameters, the cylinder having the coarser mesh being located within the larger cylinder. Y

6. A strainer comprising an upper valve casing portion and a lower bowl portion, said upper portion having a depending part which extends into the upper end of the bowl to reduce the fluid capacity of the bowl, said upper portion having a valve controlled inlet passage and a valve controlled outlet passage, and a strainer in said bowl inthe line of flow of a fluid passing therethru, and means for connecting the bowl to the upper portion in separable relation therewith, said strainer comprising two cylinders of gauze mesh of relatively different diameters, the cylinder having a coarser mesh being located within the larger cylinder and spaced therefrom, and

located adjacent the outlet of the inlet passage leading to the bowl.

7. A strainer comprising an upper valve casing portion and a lower bowl portion, said upper portion having a depending part which extends into the upper end of the bowl to re duce the fluid capacity of the bowl, said upper portion having a valve controlled inlet pas sage and avalve controlled outlet passage,

and astrainer in said bowl in the line of flow of a fluid passing therethru, and means for connecting the bowl to the upper portion in separable relation therewith, the under side of said upper portion having a depending circular flange formed thereon, and the upper side of the bottom of said bowl having a corresponding flan-ge, the ends of said strainer being held in abutting engagement between i said flanges.

In testimony ALBERT E; GRANT.

whereof I have a'flix ed my 

